| 摘要 |
<p>PURPOSE:To realize high reservation performance by transferring a recording picture on the point of time of fault occurrence from an SRAM to a flash memory for the recording so as to avoid erasure of an evidence picture. CONSTITUTION:When a driver hits the brakes, a hit brake sensor generates an emergent signal. The signal is amplified and shaped by a brake signal detection circuit in a sensor signal interface 22 and converted into a pulse signal. A system control CPUA 14 reads the pulse signal and outputs a control signal to a CPUB 20 and a memory control counter 15. Upon the receipt of the signal, after the counter 15 keeps recording of a predetermined frame number, the counter 15 stops recording to an SRAM memory 17 to select a selector 16 to transfer picture data to a flash memory 18. Thus, a picture on the occurrence of an accident and for a predetermined period after that is recorded in the memory 18 thereby obtaining evidence data for liability of the accident not erased at all.</p> |
